Improvement in tumblers for permutation-locks



Patented May 8,1877.

mega.-

NlFEfERS, FNDTO-LITHOGRAFHER, WASHINGTON Dv C,

' center tumbler-wheel.

THOMAS FOX, or BAY CITY, MICHIGAN, AssIeNoR OFONE-HALF ms 1 RIGHT TO JAMES JOSEPH FITZGERRELL.

IMPROVEMENT IN TUMBLERS FOR PERMUTATION-LOCKS. 4

Specification forming part of Letters Patent No. 190,57l, dated May 8, 1877; application filed September 28, 1876.

' To all whom it may concern:

Be it known that I, THOMAS FOX, of Bay City, in the county of Bay and State of Michigan, have invented certain new and useful Improvements in Trunk-Locks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in permutation-locks; and consists in thereonstruction and arrangementof the various parts composing the tumblers of such locks,as hereinafter fully set forth and claimed.

To enable those skilled in the art of manufacturing locks to comprehend my invention, I will describe its construction, as follows Figure 1 is a face view of the lock'as shown from the outside when the lock is in place. Fig. 2 is a vertical section through the center of the lock, showing a section of the tumbier-wheels; Fig. 3, a back view of the lock, with the back and one tumbler-wheel removed; Fig. 4, a section of one of the outside tumbler-wheels, with sleeve and shaft; Fig. 5, a cogged carrier-plate;.Fig. 6, a side view of tumbler-wheel, with cogged hub and cogged carrier-plate in place.

In the drawings, a represents the upper portion of the hasp; b, the lower portion of the hasp; c, the recessed dial plate; d, the finger-lever, provided with an index-pointer; e, the hasp-staple; f, the spring-bolt; g, the

h is the cogged carrier-plate; t, the driving-wheel; j, the shaft; k, the sleeve; 1, the back plate.

1 construct my lock with the sleeve It and back plate I combined, and dressing the outside of the sleeve and the inside of the back plate. I then place the tumbler-wheel n around the sleeve with its cogged hub upward. 1 then place on this the cogged carrier-plate h, in such a position as I desire, to make up the combination. I then place on the 'same sleeve a thin washer, which has one side of its opening flatted to prevent its turning, thereby preventing motion from being conveyed from one tumbler-wheel toanother by friction. I then place on the same sleeve the center tumbler-wheel g, which is, provided with a post, extending each way, of sufflcient length to engage with the fingers of the carrier-plates h, but not long enough to bind on the driving-wheel t. I then follow with a washer and carrier-plate, as be fore described, their relation to the centerwheel being the same. The next, which is the driving-wheel i, I construct in connection with the shaft j, and place the shaft j inside the sleeve k. The driving-wheel has a projection corresponding with the thickness of the dial-plate. This being put in place I secure my index pointer and fingerlever with a screw to the shaft. Each of the tumbier-wheels and the driving-wheel have a notch in the periphery, one side of the notch in the driving-wheel being cut away to form an inclined plane, for the purpose of raising the hook m by a reverse motion of the operating or finger lever d. If the finger-lever be turned in either direction until the notch in the bottom tumblerwheel n is directly in line with the hook m, and then reversed, the center-wheel 9 may be rotated a sufficient distance to place its notch in line with the hook m. Again, reversing the motion of the lever d, the notch in the driving-wheel will be brought under the hook m, which, acted upon by a spring, will drop into all the notches simultaneously. Then by rotating the drivingwheel to the right it will draw back on the hook m, transmitting the power by elbow joint to the spring bolt f, drawing it out from the staple 0, thereby unlocking the lock and allowing the staple e to spring out.

It will be seen that, should the carrier-plate be changed to any other position on the cogged hub of the tumbler, the combination would be changed, the same being true of either of the carrier-plates, thereby securing a great many changes.

I am aware that tumbler-wheels with notches in their periphery are in common use in locks of this class, and that spring-bolts with elbowjoints and hooks or dogs are also used; there fore,

What I claim, and desire to secure by Letfixed my signature this 13th day of Septemters Patent, is her, 1876, in the presence of two witnesses.

The tumbler-wheel n provided with vthe cogged hub, in combination with the carrier- THOMAS plate h, having internal cogs and a projecting Witnesses: finger, substantially as described. a E; E. BRIGGS,

In testimony whereof I have hereunto a-f- A. H. WHIPPLE. 

